The velocity field in the near wake of a small-scale, flexible, flat circular parachute canopy was measured by the particle image velocimetry method. The experiments were performed in a water tunnel with the Reynolds number ranging from 3.0-6.0 x10(4). Both a fully inflated canopy and the inflation phase were investigated. The fully inflated canopy experienced a cyclic 'breathing' motion with a normalized frequency of 0.56 +/- 0.03, which corresponded to the shedding of vortex rings from the canopy. The boundary layer formed on the canopy surface begins to separate near the apex region when the diameter is approximately 68% of the fully inflated diameter.


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    Title :

    Aerodynamics of Parachute Opening


    Contributors:
    H. Johari (author) / K. J. Desabrais (author)

    Publication date :

    2002


    Size :

    131 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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